OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..19
EXAMPLE
Some solutions for 4X4
..1..0..2..0....2..2..2..0....2..2..0..2....2..2..2..2....0..2..2..0
..0..2..2..2....2..2..0..2....2..2..2..0....2..2..0..2....2..2..0..1
..2..2..0..2....2..0..1..0....0..2..0..1....2..0..1..0....2..0..1..0
..0..2..2..2....0..2..0..2....2..0..1..2....2..2..0..2....0..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 29 2011
STATUS
approved